Refactor content/renderer/accessibility to use AXTreeSerializer (re-land).

content/renderer/accessibility/blink_ax_tree_source.h

Index: content/renderer/accessibility/blink_ax_tree_source.h
diff --git a/content/renderer/accessibility/blink_ax_tree_source.h b/content/renderer/accessibility/blink_ax_tree_source.h
new file mode 100644
index 0000000000000000000000000000000000000000..9754229fc3b38d5af95b1f14f2ce441dc5e6b850
--- /dev/null
+++ b/content/renderer/accessibility/blink_ax_tree_source.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
+#define CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
+
+#include "third_party/WebKit/public/web/WebAXObject.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_tree_source.h"
+
+namespace content {
+
+class RenderViewImpl;
+
+class BlinkAXTreeSource
+    : public ui::AXTreeSource<blink::WebAXObject> {
+ public:
+  BlinkAXTreeSource(RenderViewImpl* render_view);
+  virtual ~BlinkAXTreeSource();
+
+  // AXTreeSource implementation.
+  virtual blink::WebAXObject GetRoot() const OVERRIDE;
+  virtual blink::WebAXObject GetFromId(int32 id) const OVERRIDE;
+  virtual int32 GetId(blink::WebAXObject node) const OVERRIDE;
+  virtual void GetChildren(
+      blink::WebAXObject node,
+      std::vector<blink::WebAXObject>* out_children) const OVERRIDE;
+  virtual blink::WebAXObject GetParent(blink::WebAXObject node) const
+      OVERRIDE;
+  virtual void SerializeNode(blink::WebAXObject node,
+                             ui::AXNodeData* out_data) const OVERRIDE;
+  virtual bool IsValid(blink::WebAXObject node) const OVERRIDE;
+  virtual bool IsEqual(blink::WebAXObject node1,
+                       blink::WebAXObject node2) const OVERRIDE;
+  virtual blink::WebAXObject GetNull() const OVERRIDE;
+
+  blink::WebDocument GetMainDocument() const;
+
+ private:
+  RenderViewImpl* render_view_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_